AMD’s Radeon Image Sharpening feature is designed to improve image quality with minimal performance costs. However, it is only supported by Radeon Polaris / Vega / Navi graphics cards and only under Microsoft Windows 10. An independent open-source project has implemented contrast adaptive sharpening support for Vulkan that is similar to Radeon Image Sharpening but will work for any Vulkan-enabled GPU — including NVIDIA GPUs…

Source: Phoronix – Open-Source C.A.S. Vulkan Layer – Similar to Radeon Image Sharpening But For Any GPU